Grille or grating



July 6 1926. 1,591,328

M. LACHMAN I GRILLE OR GRATING Filed March 3, 1925 INVENTOR Mow/Ce Lac/2mm).

v BY

new Jul e. 1926.

UNITED srarns PATENT, OFFICE. f

MAURICE IEAGHMAN, OF NEW YORK, N. Y., ABSIGIFOB ONE-Tm .lO JOHN? B. 4

' TENCE AND ONE-THIRD T0 ALEXANDER LAGKEY, BOTH OI YQBI, 1L3. I

-- cam on (marine.

Application filed larch a, 1925. Serial it. man.

This invention relates to theroduction of metallic grilles or gratings or use as protecting screens for machinery, areaways and the like.

It is a primary object of the invention to provide a permanent reinforcement for a so form the metal grating that it will have no projecting parts and that it will hayea neat outward appearance.

Other and more specific ob'ects will a pear as the description proc s.

In the drawings Fig. 1 illustrates one complete embodiment of my invention wherein I have shown a the ed section of a metallic grating.

Fig. 2 is a section thereof taken substantially on the line 22 of Fig. .1.

Fig. 3 is a similar section on the line 33 of Fig. 1. Fig. 4 shows an alternate form of reinforcing strip which may be used.

Fig. 5 shows a second modification thereof.

Fig. 6 is a section through the edge of themetal grating wherein the form of reinforcing strip shown in Fig. 4 is used.

The body of the grating according to my invention is preferably com osed of the screen part 8 which is forme from a plate of sheet steel properly slitted and expanded to the shape of grating desired. ThlS form of screen forms no part of my present invention. The thickness of the sheet of steel, the length and spacing of the slits therein and the distance to. which it is expanded depends upon the use for which the final product is intended.

In order to pro erly reinforce and protect of t e ody part ofthe screen so that t ere will be no projecting parts. to

I work loose, I have shown, accordin to the first form of my invention, a channe ed strip 10 having the body part 11 lying in a plane parallel with the body of the screen 8, the flanges 12 and 13 projecting in the same general direction from the body part 11 of the strip. In securing the channeled stri to the metal screen t e strip is so place same weldin process, so that the on with r extende ends of the some t to the. screen that the edgeor' n proper lie in a position between the flanges 12 and 13. The

rated from vibrations, pressure or ot or causes. The extended ends of the screen within the channel are preferably sunk slightly as indicated at 14, so as to further avoid any undesirable projecting points of the material of the screen. In order to more firmly secure the screen and reinforcing stri s I ma .fill the channel of the strip 10 wit a bar cement 16, as shown in the drawings.

I have shown the additional \metal strip 18' as extended across the flanges 12 and 13 and permanently secured thereto. as by the welding method referred to above or'other wise, in order to further reinforce the grating and to insure that the grating and reinforcing strips will be permanently secured together. The stripv 18 gives a more finished appearance to the ting and may be used particularly where th sides of the grating will be exposed. A I

In Figs. 4 and 6 I have shown the reinforcing strip 20 formed as an angle'with the body part 21 and the extended flange 22 21 a distance substantially the same as the lihood of these parts ever becoming se ai thickness of'the sheet metal forming the body part of the grating. The projecting or outer ends of the screen 8 are, acoo to this form of'the invention, permanently welded to the ribs 23, also preferablgsby the of the screen will e against the inner or flanged face ofthe body .21 of the strip. This forms a particularly strong joint between the parts in view of the continuous contact surface between the ends of the screen 8 and body part ing strips and the body part 21. If desired, one of the flanges 23 may be omitted as shown for example in Fig. 5. The form shown in Fig. 5 may be used particularly where a light gratin is to be formed and one not subject to l iard usage.

A ating formed as herein disclosed is founfto posses great strength and does not become weakened through use or vibration,

but it will stand the most severe strains without the tendency to become loosened. This result follows because of the substan tially integral relation between the reinforcproper of the screen.

While I have shown my invention as particularly applicable to an expanded metal grating it is apparent that the invention is not so limited but that other forms of integral grating may be reinforced and supported as herein disclosed. The particular forms of reinforcing strips or edgings which I have herein disclosed may obviously be varied to suit the purpose for which the finished product is intended without departing from the spirit of my invention. I desire it to be understood that the particular D forms to be consideredvmerely as illustrative and that I am limited only as set forth in the appended claims. 1

I claim as my invention:

1. A metal grille or grating embodying a reinforcing frame and a one piece screen portion, saidreinforcing frame being provided with a projecting flange, portions of said screen being welded to said flange and merged into the same so that the exposed surface of said edge lies substantially flush with the outer or free edge of said flange 2. A metal grille or grating comprising an integral screen portion and a reinforcing frame, said frame including a body part a screen lying substantially parallel to the plane of said screen, and flanges extending outwardly from said body part, said screen being permanently welded to one of said flanges and compressed into the extended edge thereof.

3. A metal grille or grating formed with portion and a frame, said frame being substantially channelshaped with of the invention ,herein disclosed are the channel therein opening at right angles to the plane of the said screen bein extended across one of the flanges formin said channel, the extended edges ofsald screen being merged into and welded to the free edge of said flan'ge.

4. A metal grille or grating comprising a screen portion formed of expanded metal and a reinforcing frame, said frame including a body part lying substantially parallel to the plane of said screen, and a flange extending outwardly from said body part, said screen being permanently welded i to said flange and compressed into the extended edge thereof.

5. A metal grille or grating comprising a screen portion and a reinforcing frame, said screen, the edges of.

frame including a bodypart lying substan- I tially parallel to the plane of said screen,

and flanges extending outwardly from said body part, said screen being permanently O welded to one of said flanges, the space between said flanges containing cement to cover and secure the projecting ends of said screen portion to said body part.

6. A metal grille or grating formed with a screen portion and a frame, said frame being substantially channel-shaped with the channel therein opening at right angles to the'plane of the screen, said screen being permanently welded to one of the flanges forming said channel, said channel being filled with cement.

7. A metal grille or grating formed with ascreen portion and a frame, said frame being substantially channel-shaped with the channel therein opening at right angles to the plane of the screen, said screen being permanently Welded to and merged into one of the flanges forming said channel so that the outer surface of said screen and flange lie substantially flush and a plate projected across the flanges of said channel and secured to both said flanges and said screen.

Signed at New York in the county of New York and state of New York this 2nd day of March A. D. 1925.

MAURICE LioHMAN. 

